Magnetic Ressonance
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. SYNTHESIS OF GLYCEROL-FLUORINATED TRIAZOLE DERIVATIVES AND EVALUATION OF THEIR FUNGICIDAL ACTIVITY
The control of fungal species in agriculture is mainly conducted with the use of contact or systemic fungicides. However, environmental and human health concerns and increased resistance of fungal species to existing fungicides have increased the pressure on researchers to find new active ingredients for fungal control which present low toxicity to non-targe
Química Nova. Publicado em: 2022
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2. Synthesis of New Phenolic-Schiff Base and Its Application as Antioxidant in Soybean Biodiesel and Corrosion Inhibitor in AISI 1020 Carbon Steel
New Schiff base compound N, N’-bis-(4-hexadecanate)-salicylethylenediamine (named IM) was synthesized, and characterized via infrared and nuclear magnetic ressonance spectroscopies. IM was tested as corrosion inhibitor and antioxidant in soybean biodiesel. Corrosion studies were developed with AISI 1020 carbon steel in a three-step accelerated corrosion as
J. Braz. Chem. Soc.. Publicado em: 2020-03
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3. Synthetic Niobium Oxyhydroxide as a Bifunctional Catalyst for Production of Ethers and Allyl Alcohol from Waste Glycerol
A synthetic niobia was modified by treatment with hydrogen peroxide to be used as a catalyst for converting glycerol into petrochemical compounds. The catalytic properties of niobium oxyhydroxide were obtained by generating acidic and oxygenated groups (peroxo groups) on the solid surface. Compounds like ethers and allyl alcohol were obtained. A very active
J. Braz. Chem. Soc.. Publicado em: 2017-11
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4. Solid-Phase Peptide Synthesis of Dipeptide (Histidine-β-Alanine) as a Chelating Agent by Using Trityl Chloride Resin, for Removal of Al3+, Cu2+, Hg2+ and Pb2+: Experimental and Theoretical Study
Solid-phase peptide synthesis of dipeptide (histidine-β-alanine) as a chelating agent examined by common N-9-fluorenylmethyloxycarbonyl-N-trityl-L-histidine and tert-butyloxycarbonyl-β-alanine-OH amino acid derivatives. Trityl chloride resin was used as a carrier resin. The molecular structure of the dipeptide was definite by using different methods such a
J. Braz. Chem. Soc.. Publicado em: 2016-10
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5. Synthesis and Characterization of Methylcellulose Produced from Bacterial Cellulose under Heterogeneous Condition
In this work, methylcellulose (MC) was produced from bacterial cellulose (BC), using dimethyl sulfate in a 3 h (MC3h) or 5 h (MC5h) reaction under heterogeneous conditions, with reagent substitution at each hour. MC3h showed a degree of substitution (DS) of 2.26 ± 0.13 and MC5h showed a DS of 2.33 ± 0.05. The two samples were characterized by Fourier trans
J. Braz. Chem. Soc.. Publicado em: 2015-09
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6. Cytotoxic Chalcones from Desmodium oxyphyllum
Three new chalcones were isolated from Desmodium oxyphyllum. Their structures were elucidated by spectroscopic methods including extensive 1D- and 2D-nuclear magnetic ressonance techniques. The compounds were evaluated for their cytotoxicity against five human tumor cell lines (NB4, A549, SHSY5Y, PC3, and MCF7). The results showed that the compounds exhibit
J. Braz. Chem. Soc.. Publicado em: 2015-04
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7. Butyrolactones from the Endophytic Fungus Aspergillus versicolor and their Anti-Tobacco Mosaic Virus Activity
New butyrolactones aspernolides C and D, along with two known butyrolactones (A and B) were isolated from the culture of the endophytic fungus Aspergillus versicolor. Their structures were elucidated on the basis of extensive spectroscopic analysis, including 1D and 2D nuclear magnetic ressonance techniques, and electronic circular dichroism. The butyrolacto
J. Braz. Chem. Soc.. Publicado em: 2015-03
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8. Neuroimagem na dependência de jogos eletrônicos: uma revisão sistemática
Objetivo: Realizar revisão sistemática de manuscritos que utilizaram a neuroimagem no estudo da dependência de jogos eletrônicos, a fim de identificar as principais regiões cerebrais alteradas. Métodos: Foram realizadas buscas nos seguintes bancos de dados: ScieELO, BVS, Lilacs, Science Direct On Line e PubMed. Não houve data mínima para a pesquis
J. bras. psiquiatr.. Publicado em: 2014-03
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9. Application of cationic hemicelluloses produced from corn husk as polyelectrolytes in sewage treatment
Hemicelluloses were extracted from corn husk and converted into cationic hemicelluloses using 2,3-epoxypropyltrimethylammonium chloride. The degree of substitution was determined as 0.43 from results of elemental analysis. The cationic derivative was also characterized by Fourier transform infrared spectroscopy and Carbon-13 magnetic nuclear ressonance. The
Polímeros. Publicado em: 26/07/2013
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10. Estenose degenerativa do canal lombar : correlação entre o índice de Oswestry e imagem de ressonância magnética = Degenerative lumbar spinal stenosis: correlation with Oswestry index and magnetic ressonance / Degenerative lumbar spinal stenosis : correlation with Oswestry index and magnetic ressonance
Modelo de Estudo: Estudo diagnóstico Transversal de caso controle. Objetivos: comparar pacientes com estenose do canal lombar com indicação de cirurgia e um grupo controle, assintomáticos para esta doença, levando em consideração imagens de ressonância magnética (RM) e o questionário de Oswestry. Material e Método: Vinte e três pacientes com este
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2012
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11. Desenvolvimento e caracterização de dispositivo de PLLA/Trietil-Citrato associado à derme suína acelular para reparação de lesões cutâneas / Development and characterization of PLLA/Triethyl citrate device associated to acellular dermal matrix to repair cutanous wounds
One of the challenges of the Tissue Engineering is to promote a better functioning of organs and tissues damaged by diseases or traumas. With target for developing a biphasic device for future regeneration and dermal application in Tissue Engineering and Regenerative Medicine, fibroblasts from VERO cell line were cultivated on a porcine acellular dermal matr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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12. Estudos da correlação estrutura-função da enzima Clorocatecol 1,2-Dioxigenase de Pseudomonas putida / Studies of the structure-function correlation of the chlorocatechol 1,2-dioxygenase enzyme from Pseudomonas putida
O intenso uso de compostos orgânicos em conjunto com o grande avanço industrial culminou em um enorme acúmulo de poluentes orgânicos no meio ambiente. Dentre estes poluentes têm-se destacado a presença de hidrocarbonetos aromáticos altamente tóxicos e resistentes à degradação física, química, fotolítica e biológica. Desta maneira, uma nova for
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012